Herbicidal composition comprising a fluoropropylthiazoline sulfonylurea derivative and another herbicide

ABSTRACT

A mixture of a compound represented by the formula (1) and at least one compound selected from the group consisting of phenmedipham, ethofumesate, chloridazon, metamitron and triflusulfuron-methyl, which is safe for sugar beet and has excellent properties. ##STR1##

This application has been filed under 35 USC 371 as a national stage application of PCT/JP 95/01251, filed Jun. 22, 1995.

TECHNICAL FIELD

The present invention relates to a herbicidal composition containing a fluoropropylthiazoline derivative and a certain type of herbicide as active ingredients.

BACKGROUND ART

Many years of research and development of herbicides brought a great variety of chemicals into practical use, and these herbicides have contributed to labor saving in weed control and the improvement in the productivity of farm and garden crops. Even in these days, development of new chemicals having more excellent herbicidal properties is still demanded. As agricultural and horticultural herbicides, chemicals which selectively control the target weeds at low doses without showing phytotoxicity to crop plants are particularly desired. However, no existing chemicals satisfy all these desired conditions.

The compound represented by the following formula (1) in the present invention hereinafter referred to as compound (1)!, which was disclosed in International Patent Application PCT/JP95/00011, is a herbicide which shows an excellent herbicidal effect on Graminaceous weeds such as wild oat and blackgrass and broad-leaved weeds such as common lambsquater, common chickweed, kedlock and slender amaranth at low doses in foliage treatment and is fairly safe for sugar beet, but does not have much effect on some broad-leaved weeds. ##STR2##

On the other hand, the compound represented by the following formula (2) hereinafter referred to as compound (2)!, the compound represented by the formula (3) hereinafter referred to as compound (3)!, the compound represented by the formula (4) hereinafter referred to as compound (4)!, the compound represented by the formula (5) hereinafter referred to as compound (5)! and the compound represented by the formula (6) hereinafter referred to as compound (6)! are already known and in practical use as herbicides for sugar beet, but have a drawback that they don't have much effect on Graminaceous weeds or some broad-leaved weeds. ##STR3##

DISCLOSURE OF THE INVENTION

The present inventors found combined use of compound (1) and at least one compound selected from the group consisting of compound (2), compound (3), compound (4), compound (5) and compound (6) not only compensates for the drawbacks of the individual compounds used in single formulation but also enables reduction in the application dose and simultaneous control of Graminaceous weeds and broad-leaved weeds. The present invention has been accomplished on the basis of this discovery.

The common name of compound (2) in the present invention is phenmedipham, the common name of compound (3) is ethofumesate, the common name of compound (4) is chloridazon, the common name of compound (5) is metamitron, and the common name of compound (6) is triflusulfuron-methyl (test name DPX-66037).

In addition to compound (2), compound (3), compound (4), compound (5) and compound (6), the following compounds may be mentioned as a herbicide which can be used in combination with compound (1). Examples of such formulations will be given later in Formulation Examples 26 to 39.

It is also possible to add one or two of the following compounds to a mixture of compound (1) and at least one compound selected from the group consisting of compound (2), compound (3), compound (4), compound (5) and compound (6).

Desmedipham (common name), cycloate (common name), diallate (common name), lenacil (common name), TCA, pebulate (common name), endothal (common name), EPTC, fluazifop-P-butyl (common name), sethoxydim (common name), haloxyfop-methyl (common name), quizalofop-ethyl (common name), trifluralin (common name), diethatyl-ethyl (common name) and the like may be mentioned. Examples of such formulations will be given later in Formation Examples 40 to 56.

Addition of such a chemical to compound (1) or to a mixture of compound (1) and one of compounds (2) to (6) is expected to lead to, for instance, a broad weeding spectrum, a reduced application dose and persistent herbicidal effect.

In the present invention, compound (1) and one of compounds (2) to (6) are used in an appropriate ratio selected from such a range that the two chemicals do not impair each other's performance.

For example, one of compounds (2) to (6) is used preferably in an amount of from 0.01 to 500 parts by weight, more preferably from 0.1 to 100 parts by weight per 1 part by weight of compound (1).

When the herbicidal composition of the present invention is used as a herbicide, it is usually mixed with a suitable carrier, for instance, a solid carrier such as clay, talc, bentonite, diatomaceous earth or white carbon, or a liquid carrier such as water, an alcohol (such as isopropanol, butanol, benzyl alcohol or furfuryl alcohol), an aromatic hydrocarbon (such as toluene or xylene), an ether (such as an anisole), a ketone (such as cyclohexanone or isophorone), an ester (such as butyl acetate), an acid amide (such as N-methylpyrrolidone) or a halogenated hydrocarbon (such as chlorobenzene). If desired, a surfactant, an emulsifier, a dispersing agent, a penetrating agent, a spreader, a thickener, an antifreezing agent, an anticaking agent or a stabilizer may be added to prepare an optional formulation such as a liquid formulation, an emulsifiable concentrate, a wettable powder, a dry flowable, a flowable, a dust or a granule.

The herbicidal composition of the present invention is fairly safe for sugar beet and effectively controls Graminaceous weeds and broad-leaved weeds, which are harmful to cultivation of sugar beet.

Now, examples of formulations of the herbicidal composition of the present invention will be given below. However, it should be understood that the present invention is by no means restricted to such specific examples.

In the following, "parts" means "parts by weight". Formulation Example 1! Wettable powder

    ______________________________________                                         Compound (1)           3.5 parts                                               Compound (2)           28 parts                                                Zeeklite PFP           61.5 parts                                              (Tradename for a kaolin-type clay, manufactured by                             Zeeklite Industries, Co., Ltd.)                                                Sorpol 5050            2 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Lunox 1000C            3 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Carplex #80 (anticaking agent)                                                                        2 parts                                                 (Tradename for a white carbon, manufactured by Shionogi                        Pharmaceutical Co., Ltd.)                                                      ______________________________________                                    

The above ingredients were homogeneously pulverized and mixed to form a wettable powder. Formulation Example 2! Wettable powder

    ______________________________________                                         Compound (1)           1 part                                                  Compound (3)           30 parts                                                Zeeklite PFP           62 parts                                                (Tradename for a kaolin-type clay, manufactured by                             Zeeklite Industries, Co., Ltd.)                                                Sorpol 5050            2 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Lunox 1000C            3 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Carplex #80 (anticaking agent)                                                                        2 parts                                                 (Tradename for a white carbon, manufactured by Shionogi                        Pharmaceutical Co., Ltd.)                                                      ______________________________________                                    

The above ingredients were homogeneously pulverized and mixed to form a wettable powder. Formulation Example 3! Wettable powder

    ______________________________________                                         Compound (1)           0.5 part                                                Compound (4)           30 parts                                                Zeeklite PFP           62.5 parts                                              (Tradename for a kaolin-type clay, manufactured by                             Zeeklite Industries, Co., Ltd.)                                                Sorpol 5050            2 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Lunox 1000C            3 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Carplex #80 (anticaking agent)                                                                        2 parts                                                 (Tradename for a white carbon, manufactured by Shionogi                        Pharmaceutical Co., Ltd.)                                                      ______________________________________                                    

The above ingredients were homogeneously pulverized and mixed to form a wettable powder. Formulation Example 4! Wettable powder

    ______________________________________                                         Compound (1)           0.5 part                                                Compound (5)           30 parts                                                Zeeklite PFP           62.5 parts                                              (Tradename for a kaolin-type clay, manufactured by                             Zeeklite Industries, Co., Ltd.)                                                Sorpol 5050            2 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Lunox 1000C            3 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Carplex #80 (anticaking agent)                                                                        2 parts                                                 (Tradename for a white carbon, manufactured by Shionogi                        Pharmaceutical Co., Ltd.)                                                      ______________________________________                                    

The above ingredients were homogeneously pulverized and mixed to form a wettable powder. Formulation Example 5! Wettable powder

    ______________________________________                                         Compound (1)           15 parts                                                Compound (6)           15 parts                                                Zeeklite PFP           63 parts                                                (Tradename for a kaolin-type clay, manufactured by                             Zeeklite Industries, Co., Ltd.)                                                Sorpol 5050            2 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Lunox 1000             3 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Carplex #80 (anticaking agent)                                                                        2 parts                                                 (Tradename for a white carbon, manufactured by Shionogi                        Pharmaceutical Co., Ltd.)                                                      ______________________________________                                    

The above ingredients were homogeneously pulverized and mixed to form a wettable powder. Formation Example 6! Emulsifiable concentrate

    ______________________________________                                         Compound (1)           0.5 part                                                compound (2)           4 parts                                                 Xylene                 74.5 parts                                              Isophorone             15 parts                                                Sorpol 3005X           6 parts                                                 (Tradename for a mixture of nonionic and anionic                               surfactants, manufactured by Toho Chemical Industry Co.,                       Ltd.)                                                                          ______________________________________                                    

The above ingredients were homogeneously pulverized and mixed to form an emulsifiable concentrate. Formation Example 7! Emulsifiable concentrate

    ______________________________________                                         Compound (1)           0.2 part                                                compound (3)           6 parts                                                 Xylene                 72.8 parts                                              Isophorone             15 parts                                                Sorpol 3005X           6 parts                                                 (Tradename for a mixture of nonionic and anionic                               surfactants, manufactured by Toho Chemical Industry Co.,                       Ltd.)                                                                          ______________________________________                                    

The above ingredients were homogeneously pulverized and mixed to form an emulsifiable concentrate. Formation Example 8! Emulsifiable concentrate

    ______________________________________                                         Compound (1)           0.1 part                                                compound (4)           6 parts                                                 Xylene                 72.9 parts                                              Isophorone             15 parts                                                Sorpol 3005X           6 parts                                                 (Tradename for a mixture of nonionic and anionic                               surfactants, manufactured by Toho Chemical Industry Co.,                       Ltd.)                                                                          ______________________________________                                    

The above ingredients were homogeneously pulverized and mixed to form an emulsifiable concentrate. Formation Example 9! Emulsifiable concentrate

    ______________________________________                                         Compound (1)           0.1 part                                                compound (5)           6 parts                                                 Xylene                 72.9 parts                                              Isophorone             15 parts                                                Sorpol 3005X           6 parts                                                 ______________________________________                                         (Tradename for a mixture of nonionic and anionic                               surfactants, manufactured by Toho Chemical Industry Co.,                       Ltd.)                                                                          ______________________________________                                    

The above ingredients were homogeneously pulverized and mixed to form an emulsifiable concentrate. Formation Example 10! Emulsifiable concentrate

    ______________________________________                                         Compound (1)           2.5 parts                                               compound (6)           2.5 parts                                               Xylene                 74 parts                                                Isophorone             15 parts                                                Sorpol 3005X           6 parts                                                 (Tradename for a mixture of nonionic and anionic                               surfactants, manufactured by Toho Chemical Industry Co.,                       Ltd.)                                                                          ______________________________________                                    

The above ingredients were homogeneously pulverized and mixed to form an emulsifiable concentrate. Formulation Example 11! Flowable

    ______________________________________                                         Compound (1)           5 parts                                                 Compound (2)           40 parts                                                Agrizole S-711         8 parts                                                 (Tradename for a nonionic surfactant, manufactured by Kao                      Corporation)                                                                   Lunox 1000C            0.5 part                                                (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              1% Rodopol water       20 parts                                                (Tradename for a thickener, manufactured by Rhone-                             Poulenc)                                                                       Ethylene glycol (anti-freezing agent)                                                                 8 parts                                                 Water                  18.5 parts                                              ______________________________________                                    

The above ingredients were homogeneously mixed to form a flowable. Formulation Example 12! Flowable

    ______________________________________                                         Compound (1)           1.5 parts                                               Compound (3)           45 parts                                                Agrizole S-711         8 parts                                                 (Tradename for a nonionic surfactant, manufactured by Kao                      Corporation)                                                                   Lunox 1000C            0.5 part                                                (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              1% Rodopol water       20 parts                                                (Tradename for a thickener, manufactured by Rhone-                             Poulenc)                                                                       Ethylene glycol (anti-freezing agent)                                                                 8 parts                                                 Water                  17 parts                                                ______________________________________                                    

The above ingredients were homogeneously mixed to form a flowable. Formulation Example 13! Flowable

    ______________________________________                                         Compound (1)           0.75 part                                               Compound (4)           45 parts                                                Agrizole S-711         8 parts                                                 (Tradename for a nonionic surfactant, manufactured by Kao                      Corporation)                                                                   Lunox 1000C            0.5 part                                                (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              1% Rodopol water       20 parts                                                (Tradename for a thickener, manufactured by Rhone-                             Poulenc)                                                                       Ethylene glycol (anti-freezing agent)                                                                 8 parts                                                 Water                  17.75 parts                                             ______________________________________                                    

The above ingredients were homogeneously mixed to form a flowable. Formulation Example 14! Flowable

    ______________________________________                                         Compound (1)           0.75 part                                               Compound (5)           45 parts                                                Agrizole S-711         8 parts                                                 (Tradename for a nonionic surfactant, manufactured by Kao                      Corporation)                                                                   Lunox 1000C            0.5 part                                                (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              1% Rodopol water       20 parts                                                (Tradename for a thickener, manufactured by Rhone-                             Poulenc)                                                                       Ethylene glycol (anti-freezing agent)                                                                 8 parts                                                 Water                  17.75 parts                                             ______________________________________                                    

The above ingredients were homogeneously mixed to form a flowable. Formulation Example 15! Flowable

    ______________________________________                                         Compound (1)           20 parts                                                Compound (6)           20 parts                                                Agrizole S-711         8 parts                                                 (Tradename for a nonionic surfactant, manufactured by Kao                      Corporation)                                                                   Lunox 1000C            0.5 part                                                (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              1% Rodopol water       20 parts                                                (Tradename for a thickener, manufactured by Rhone-                             Poulenc)                                                                       Ethylene glycol (anti-freezing agent)                                                                 8 parts                                                 Water                  23.5 parts                                              ______________________________________                                    

The above ingredients were homogeneously mixed to form a flowable. Formulation Example 16! Granular wettable powder (dry flowable)

    ______________________________________                                         Compound (1)           8 parts                                                 Compound (2)           64 parts                                                Isoban No. 1           10 parts                                                (Tradename for an anionic surfactant, manufactured by                          Kuraray Isoprene Chemical Co., Ltd.)                                           Vanilex N              5 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Sanyo-Kokusaku Pulp Co. Ltd.)                                                  Carplex #80            13 parts                                                (Tradename for a white carbon, manufactured by Shionogi                        Pharmaceutical Co., Ltd.)                                                      ______________________________________                                    

The above ingredients were homogeneously pulverized and mixed to form a dry flowable. Formulation Example 17! Granular wettable powder (dry flowable)

    ______________________________________                                         Compound (1)           2.5 parts                                               Compound (3)           75 parts                                                Isoban No. 1           10 parts                                                (Tradename for an anionic surfactant, manufactured by                          Kuraray Isoprene Chemical Co., Ltd.)                                           Vanilex N               5 parts                                                (Tradename for an anionic surfactant, manufactured by                          Sanyo-Kokusaku Pulp Co. Ltd.)                                                  Carplex #80            7.5 parts                                               (Tradename for a white carbon, manufactured by Shionogi                        Pharmaceutical Co., Ltd.)                                                      ______________________________________                                    

The above ingredients were homogeneously pulverized and mixed to form a dry flowable. Formulation Example 18! Granular wettable powder (dry flowable)

    ______________________________________                                         Compound (1)           1.2 parts                                               Compound (4)           72 parts                                                Isoban No. 1           10 parts                                                (Tradename for an anionic surfactant, manufactured by                          Kuraray Isoprene Chemical Co., Ltd.)                                           Vanilex N              5 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Sanyo-Kokusaku Pulp Co. Ltd.)                                                  Carplex #80            11.8 parts                                              (Tradename for a white carbon, manufactured by Shionogi                        Pharmaceutical Co., Ltd.)                                                      ______________________________________                                    

The above ingredients were homogeneously pulverized and mixed to form a dry flowable. Formulation Example 19! Granular wettable powder (dry flowable)

    ______________________________________                                         Compound (1)           1.2 parts                                               Compound (5)           72 parts                                                Isoban No. 1           10 parts                                                (Tradename for an anionic surfactant, manufactured by                          Kuraray Isoprene Chemical Co., Ltd.)                                           Vanilex N              5 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Sanyo-Kokusaku Pulp Co. Ltd.)                                                  Carplex #80            11.8 parts                                              (Tradename for a white carbon, manufactured by Shionogi                        Pharmaceutical Co., Ltd.)                                                      ______________________________________                                    

The above ingredients were homogeneously pulverized and mixed to form a dry flowable. Formulation Example 20! Granular wettable powder (dry flowable)

    ______________________________________                                         Compound (1)           38 parts                                                Compound (6)           38 parts                                                Isoban No. 1           10 parts                                                (Tradename for an anionic surfactant, manufactured by                          Kuraray Isoprene Chemical Co., Ltd.)                                           Vanilex N              5 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Sanyo-Kokusaku Pulp Co. Ltd.)                                                  Carplex #80            9 parts                                                 (Tradename for a white carbon, manufactured by Shionogi                        Pharmaceuticai Co., Ltd.)                                                      ______________________________________                                    

The above ingredients were homogeneously pulverized and mixed to form a dry flowable. Formulation Example 21! Granule

    ______________________________________                                         Compound (1)           0.05 part                                               Compound (2)           0.4 part                                                Bentonite              50.0 parts                                              Talc                   44.55 parts                                             Toxanone GR-31A        5 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Sanyo Chemical Industries, Ltd.)                                               ______________________________________                                    

The above ingredients were homogeneously mixed and pulverized, and after addition of a small amount of water, the mixture was kneaded, mixed and granulated by an extrusion-type granulating machine, followed by drying to obtain a granule. Formulation Example 22! Granule

    ______________________________________                                         Compound (1)           0.015 part                                              Compound (3)           0.45 part                                               Bentonite              50.0 parts                                              Talc                   44.535 parts                                            Toxanone GR-31A        5 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Sanyo Chemical Industries, Ltd.)                                               ______________________________________                                    

The above ingredients were homogeneously mixed and pulverized, and after addition of a small amount of water, the mixture was kneaded, mixed and granulated by an extrusion-type granulating machine, followed by drying to obtain a granule. Formulation Example 23! Granule

    ______________________________________                                         Compound (1)           0.01 part                                               Compound (4)           0.6 part                                                Bentonite              50.0 parts                                              Talc                   44.39 parts                                             Toxanone GR-31A        5 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Sanyo Chemical Industries, Ltd.)                                               ______________________________________                                    

The above ingredients were homogeneously mixed and pulverized, and after addition of a small amount of water, the mixture was kneaded, mixed and granulated by an extrusion-type granulating machine, followed by drying to obtain a granule. Formulation Example 24! Granule

    ______________________________________                                         Compound (1)           0.01 part                                               Compound (5)           0.6 part                                                Bentonite              50.0 parts                                              Talc                   44.39 parts                                             Toxanone GR-31A        5 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Sanyo Chemical Industries, Ltd.)                                               ______________________________________                                    

The above ingredients were homogeneously mixed and pulverized, and after addition of a small amount of water, the mixture was kneaded, mixed and granulated by an extrusion-type granulating machine, followed by drying to obtain a granule. Formulation Example 25! Granule

    ______________________________________                                         Compound (1)           0.25 part                                               Compound (6)           0.25 part                                               Bentonite              50.0 parts                                              Talc                   44.5 parts                                              Toxanone GR-31A        5 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Sanyo Chemical Industries, Ltd.)                                               ______________________________________                                    

The above ingredients were homogeneously mixed and pulverized, and after addition of a small amount of water, the mixture was kneaded, mixed and granulated by an extrusion-type granulating machine, followed by drying to obtain a granule. Formulation Example 26! Flowable

    ______________________________________                                         Compound (1)           4 parts                                                 Desmedipham            40 parts                                                Agrizole S-711         8 parts                                                 (Tradename for a nonionic surfactant, manufactured by Kao                      Corporation)                                                                   Lunox 1000C            0.5 part                                                (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              1% Rodopol water       20 parts                                                (Tradename for a thickener, manufactured by Rhone-                             Poulenc)                                                                       Ethylene glycol (anti-freezing agent)                                                                 8 parts                                                 Water                  19.5 parts                                              ______________________________________                                    

The above ingredients were homogeneously mixed to form a flowable. Formulation Example 27! Wettable powder

    ______________________________________                                         Compound (1)           0.5 part                                                Cycloate               30 parts                                                Zeeklite PFP           44.5 parts                                              (Tradename for a kaolin-type clay, manufactured by                             Zeeklite Industries Co. Ltd.)                                                  Sorpol 5050            2 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Lunox 1000C            3 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Carplex #80 (anticaking agent)                                                                        20 parts                                                (Tradename for a white carbon, manufactured by Shionogi                        Pharmaceutical Co., Ltd.)                                                      ______________________________________                                    

The above ingredients were homogeneously pulverized and mixed to form a wettable powder. Formulation Example 28! Wettable powder

    ______________________________________                                         Compound (1)           1 part                                                  Diallate               30 parts                                                Zeeklite PFP           44 parts                                                (Tradename for a kaolin-type clay, manufactured by                             Zeeklite Industries Co., Ltd.)                                                 Sorpol 5050            2 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Lunox 1000C            3 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Carplex #80 (anticaking agent)                                                                        20 parts                                                (Tradename for a white carbon, manufactured by Shionogi                        Pharmaceutical Co., Ltd.)                                                      ______________________________________                                    

The above ingredients were homogeneously pulverized and mixed to form a wettable powder. Formulation Example 29! Flowable

    ______________________________________                                         Compound (1)           2.5 parts                                               Lenacil                40 parts                                                Agrizole S-711         8 parts                                                 (Tradename for a nonionic surfactant, manufactured by Kao                      Corporation)                                                                   Lunox 1000C            0.5 part                                                (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              1% Rodopol water       20 parts                                                (Tradename for a thickener, manufactured by Rhone-                             Poulenc)                                                                       Ethylene glycol (anti-freezing agent)                                                                 8 parts                                                 Water                  21 parts                                                ______________________________________                                    

The above ingredients were homogeneously mixed to form a flowable. Formulation Example 30! Flowable

    ______________________________________                                         Compound (1)           0.4 part                                                TCA                    40 parts                                                Agrizole S-711         8 parts                                                 (Tradename for a nonionic surfactant, manufactured by Kao                      Corporation)                                                                   Lunox 1000C            0.5 part                                                (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              1% Rodopol water       20 parts                                                (Tradename for a thickener, manufactured by Rhone-                             Poulenc)                                                                       Ethylene glycol (anti-freezing agent)                                                                 8 parts                                                 Water                  23.1 parts                                              ______________________________________                                    

The above ingredients were homogeneously mixed to form a flowable. Formulation Example 31! Wettable powder

    ______________________________________                                         Compound (1)           0.75 part                                               Pebulate               30 parts                                                Zeeklite PFP           44.25 parts                                             (Tradename for a kaolin-type clay, manufactured by                             Zeeklite Industries Co., Ltd.)                                                 Sorpol 5050            2 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Lunox 1000C            3 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Carplex #80 (anticaking agent)                                                                        20 parts                                                (Tradename for a white carbon, manufactured by Shionogi                        Pharmaceutical Co., Ltd.)                                                      ______________________________________                                    

The above ingredients were homogeneously pulverized and mixed to form a wettable powder. Formulation Example 32! Flowable

    ______________________________________                                         Compound (1)           2 parts                                                 Endothal               40 parts                                                Agrizole S-711         8 parts                                                 (Tradename for a nonionic surfactant, manufactured by Kao                      Corporation)                                                                   Lunox 1000C            0.5 part                                                (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              1% Rodopol water       20 parts                                                (Tradename for a thickener, manufactured by Rhone-                             Poulenc)                                                                       Ethylene glycol (anti-freezing agent)                                                                 8 parts                                                 Water                  21.5 parts                                              ______________________________________                                    

The above ingredients were homogeneously mixed to form a flowable. Formulation Example 33! Wettable powder

    ______________________________________                                         Compound (1)           0.75 part                                               EPTC                   30 parts                                                Zeeklite PFP           44.25 parts                                             (Tradename for a kaolin-type clay, manufactured by                             Zeeklite Industries Co., Ltd.)                                                 Sorpol 5050            2 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Lunox 1000C            3 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Carplex #80 (anticaking agent)                                                                        20 parts                                                (Tradename for a white carbon, manufactured by Shionogi                        Pharmaceutical Co., Ltd.)                                                      ______________________________________                                    

The above ingredients were homogeneously pulverized and mixed to form a wettable powder. Formulation Example 34! Wettable powder

    ______________________________________                                         Compound (1)           8 parts                                                 Fluazifop-P-butyl      20 parts                                                Zeeklite PFP           47 parts                                                (Tradename for a kaolin-type clay, manufactured by                             Zeeklite Industries Co., Ltd.)                                                 Sorpol 5050            2 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Lunox 1000C            3 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Carplex #80 (anticaking agent)                                                                        20 parts                                                (Tradename for a white carbon, manufactured by Shionogi                        Pharmaceutical Co., Ltd.)                                                      ______________________________________                                    

The above ingredients were homogeneously pulverized and mixed to form a wettable powder. Formulation Example 35! Wettable powder

    ______________________________________                                         Compound (1)           4 parts                                                 Sethoxydim             32 parts                                                Zeeklite PFP           39 parts                                                (Tradename for a kaolin-type clay, manufactured by                             Zeeklite Industries Co., Ltd.)                                                 Sorpol 5050            2 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Lunox 1000C            3 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Carplex #80 (anticaking agent)                                                                        20 parts                                                (Tradename for a white carbon, manufactured by Shionogi                        Pharmaceutical Co., Ltd.)                                                      ______________________________________                                    

The above ingredients were homogeneously pulverized and mixed to form a wettable powder. Formulation Example 36! Flowable

    ______________________________________                                         Compound (1)           7 parts                                                 Haloxyfop-methyl       39.2 parts                                              Agrizole S-711         8 parts                                                 (Tradename for a nonionic surfactant, manufactured by Kao                      Corporation)                                                                   Lunox 1000C            0.5 part                                                (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              1% Rodopol water       20 parts                                                (Tradename for a thickener, manufactured by Rhone-                             Poulenc)                                                                       Ethylene glycol (anti-freezing agent)                                                                 8 parts                                                 Water                  17.3 parts                                              ______________________________________                                    

The above ingredients were homogeneously mixed to form a flowable. Formulation Example 37! Flowable

    ______________________________________                                         Compound (1)           20 parts                                                Quizalofop-ethyl       20 parts                                                Agrizole S-711         8 parts                                                 (Tradename for a nonionic surfactant, manufactured by Kao                      Corporation)                                                                   Lunox 1000C            0.5 part                                                (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              1% Rodopol water       20 parts                                                (Tradename for a thickener, manufactured by Rhone-                             Poulenc)                                                                       Ethylene glycol (anti-freezing agent)                                                                 8 parts                                                 Water                  23.5 parts                                              ______________________________________                                    

The above ingredients were homogeneously mixed to form a flowable. Formulation Example 38! Flowable

    ______________________________________                                         Compound (1)           4 parts                                                 Trifluralin            40 parts                                                Agrizole S-711         8 parts                                                 (Tradename for a nonionic surfactant, manufactured by Kao                      Corporation)                                                                   Lunox 1000C            0.5 part                                                (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              1% Rodopol water       20 parts                                                (Tradename for a thickener, manufactured by Rhone-                             Poulenc)                                                                       Ethylene glycol (anti-freezing agent)                                                                 8 parts                                                 Water                  19.5 parts                                              ______________________________________                                    

The above ingredients were homogeneously mixed to form a flowable. Formulation Example 39! Flowable

    ______________________________________                                         Compound (1)           2 parts                                                 Diethatyl-ethyl        40 parts                                                Agrizole S-711         8 parts                                                 (Tradename for a nonionic surfactant, manufactured by Kao                      Corporation)                                                                   Lunox 1000C            0.5 part                                                (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              1% Rodopol water       20 parts                                                (Tradename for a thickener, manufactured by Rhone-                             Poulenc)                                                                       Ethylene glycol (anti-freezing agent)                                                                 8 parts                                                 Water                  21.5 parts                                              ______________________________________                                    

The above ingredients were homogeneously mixed to form a flowable. Formulation Example 40! Wettable powder

    ______________________________________                                         Compound (1)           0.75 part                                               Compound (2)           6 parts                                                 Diallate               22.5 parts                                              Zeeklite PFP           45.75 parts                                             (Tradename for a kaolin-type clay, manufactured by                             Zeeklite Industries Co., Ltd.)                                                 Sorpol 5050            2 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Lunox 1000C            3 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Carplex #80 (anticaking agent)                                                                        20 parts                                                (Tradename for a white carbon, manufactured by Shionogi                        Pharmaceutical Co., Ltd.)                                                      ______________________________________                                    

The above ingredients were homogeneously pulverized and mixed to form a wettable powder. Formulation Example 41! Wettable powder

    ______________________________________                                         Compound (1)           2.6 parts                                               Compound (2)           20.8 parts                                              Fluazifop-P-buty1      6.5 parts                                               Zeeklite PFP           45.1 parts                                              (Tradename for a kaolin-type clay, manufactured by                             Zeeklite Industries Co., Ltd.)                                                 Sorpol 5050            2 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Lunox 1000C            3 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Carplex #80 (anticaking agent)                                                                        20 parts                                                (Tradename for a white carbon, manufactured by Shionogi                        Pharmaceutical Co., Ltd.)                                                      ______________________________________                                    

The above ingredients were homogeneously pulverized and mixed to form a wettable powder. Formulation Example 42! Wettable powder

    ______________________________________                                         Compound (1)           1.8 parts                                               Compound (2)           14.4 parts                                              Sethoxydim             14.4 parts                                              Zeeklite PFP           44.4 parts                                              (Tradename for a kaolin-type clay, manufactured by                             Zeeklite Industries Co., Ltd.)                                                 Sorpol 5050            2 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Lunox 1000C            3 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Carplex #80 (anticaking agent)                                                                        20 parts                                                (Tradename for a white carbon, manufactured by Shionogi                        Pharmaceutical Co., Ltd.)                                                      ______________________________________                                    

The above ingredients were homogeneously pulverized and mixed to form a wettable powder. Formulation Example 43! Flowable

    ______________________________________                                         Compound (1)           2.8 parts                                               Compound (2)           22.4 parts                                              Haloxyfop-methyl       15.68 parts                                             Agrizole S-711         8 parts                                                 (Tradename for a nonionic surfactant, manufactured by Kao                      Corporation)                                                                   Lunox 1000C            0.5 part                                                (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              1% Rodopol water       20 parts                                                (Tradename for a thickener, manufactured by Rhone-                             Poulenc)                                                                       Ethylene glycol (anti-freezing agent)                                                                 8 parts                                                 Water                  22.62 parts                                             ______________________________________                                    

The above ingredients were homogeneously mixed to form a flowable. Formulation Example 44! Flowable

    ______________________________________                                         Compound (1)           4 parts                                                 Compound (2)           32 parts                                                Quizalofop-ethyl       4 parts                                                 Agrizole S-711         8 parts                                                 (Tradename for a nonionic surfactant, manufactured by Kao                      Corporation)                                                                   Lunox 1000C            0.5 part                                                (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              1% Rodopol water       20 parts                                                (Tradename for a thickener, manufactured by Rhone-                             Poulenc)                                                                       Ethylene glycol (anti-freezing agent)                                                                 8 parts                                                 Water                  23.5 parts                                              ______________________________________                                    

The above ingredients were homogeneously mixed to form a flowable. Formulation Example 45! Flowable

    ______________________________________                                         Compound (1)           2 parts                                                 Compound (2)           16 parts                                                Trifluralin            20 parts                                                Agrizole S-711         8 parts                                                 (Tradename for a nonionic surfactant, manufactured by Kao                      Corporation)                                                                   Lunox 1000C            0.5 part                                                (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              1% Rodopol water       20 parts                                                (Tradename for a thickener, manufactured by Rhone-                             Poulenc)                                                                       Ethylene glycol (anti-freezing agent)                                                                 8 parts                                                 Water                  25.5 parts                                              ______________________________________                                    

The above ingredients were homogeneously mixed to form a flowable. Formulation Example 46! Flowable

    ______________________________________                                         Compound (1)           1.4 parts                                               Compound (2)           11.2 parts                                              Diethatyl-ethyl        28 parts                                                Agrizole S-711         8 parts                                                 (Tradename for a nonionic surfactant, manufactured by Kao                      Corporation)                                                                   Lunox 1000C            0.5 part                                                (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              1% Rodopol water       20 parts                                                (Tradename for a thickener, manufactured by Rhone-                             Poulenc)                                                                       Ethylene glycol (anti-freezing agent)                                                                 8 parts                                                 Water                  22.9 parts                                              ______________________________________                                    

The above ingredients were homogeneously mixed to form a flowable. Formulation Example 47! Wettable powder

    ______________________________________                                         Compound (1)           0.8 part                                                Compound (3)           24 parts                                                Sethoxydim             6.4 parts                                               Zeeklite PFP           43.8 parts                                              (Tradename for a kaolin-type clay, manufactured by                             Zeeklite Industries Co., Ltd.)                                                 Sorpol 5050            2 parts                                                 (Tradename for an anionic surfactant manufactured by                           Toho Chemical Industry Co., Ltd.)                                              Lunox 1000C            3 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Carplex #80 (anticaking agent)                                                                        20 parts                                                (Tradename for a white carbon, manufactured by Shionogi                        Pharmaceutical Co., Ltd.)                                                      ______________________________________                                    

The above ingredients were homogeneously pulverized and mixed to form a wettable powder. Formulation Example 48! Flowable

    ______________________________________                                         Compound (1)           1.25 parts                                              Compound (3)           37.5 parts                                              Quizalofop-ethyl       1.25 parts                                              Agrizole S-711         8 parts                                                 (Tradename for a nonionic surfactant, manufactured by Kao                      Corporation)                                                                   Lunox 1000C            0.5 part                                                (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              1% Rodopol water       20 parts                                                (Tradename for a thickener, manufactured by Rhone-                             Poulenc)                                                                       Ethylene glycol (anti-freezing agent)                                                                 8 parts                                                 Water                  23.5 parts                                              ______________________________________                                    

The above ingredients were homogeneously mixed to form a flowable. Formulation Example 49! Wettable powder

    ______________________________________                                         Compound (1)           0.5 part                                                Compound (4)           30 parts                                                Sethoxydim             4 parts                                                 Zeeklite PFP           40.5 parts                                              (Tradename for a kaolin-type clay, manufactured by                             Zeeklite Industries Co., Ltd.)                                                 Sorpol 5050            2 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Lunox 1000C            3 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Carplex #80 (anticaking agent)                                                                        20 parts                                                (Tradename for a white carbon, manufactured by Shionogi                        Pharmaceutical Co., Ltd.)                                                      ______________________________________                                    

The above ingredients were homogeneously pulverized and mixed to form a wettable powder. Formulation Example 50! Flowable

    ______________________________________                                         Compound (1)           0.65 part                                               Compound (4)           39 parts                                                Quizalofop-ethyl       0.65 part                                               Agrizole S-711         8 parts                                                 (Tradename for a nonionic surfactant, manufactured by Kao                      Corporation)                                                                   Lunox 1000C            0.5 part                                                (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              1% Rodopol water       20 parts                                                (Tradename for a thickener, manufactured by Rhone-                             Poulenc)                                                                       Ethylene glycol (anti-freezing agent)                                                                 8 parts                                                 Water                  23.2 parts                                              ______________________________________                                    

The above ingredients were homogeneously mixed to form a flowable. Formulation Example 51! Wettable powder

    ______________________________________                                         Compound (1)           0.5 part                                                Compound (5)           30 parts                                                Sethoxydim             4 parts                                                 Zeeklite PFP           40.5 parts                                              (Tradename for a kaolin-type clay, manufactured by                             Zeeklite Industries Co., Ltd.)                                                 Sorpol 5050            2 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Lunox 1000C            3 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Carplex #80 (anticaking agent)                                                                        20 parts                                                (Tradename for a white carbon, manufactured by Shionogi                        Pharmaceutical Co., Ltd.)                                                      ______________________________________                                    

The above ingredients were homogeneously pulverized and mixed to form a wettable powder. Formulation Example 52! Flowable

    ______________________________________                                         Compound (1)           0.65 part                                               Compound (5)           39 parts                                                Quizalofop-ethyl       0.65 part                                               Agrizole S-711         8 parts                                                 (Tradename for a nonionic surfactant, manufactured by Kao                      Corporation)                                                                   Lunox 1000C            0.5 part                                                (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              1% Rodopol water       20 parts                                                (Tradename for a thickener, manufactured by Rhone-                             Poulenc)                                                                       Ethylene glycol (anti-freezing agent)                                                                 8 parts                                                 Water                  23.2 parts                                              ______________________________________                                    

The above ingredients were homogeneously mixed to form a flowable. Formulation Example 53! Wettable powder

    ______________________________________                                         Compound (1)           7 parts                                                 Compound (6)           7 parts                                                 Fluazifop-P-butyl      17.5 parts                                              Zeeklite PFP           43.5 parts                                              (Tradename for a kaolin-type clay, manufactured by                             Zeeklite Industries Co., Ltd.)                                                 Sorpol 5050            2 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Lunox 1000C            3 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Carplex #80 (anticaking agent)                                                                        20 parts                                                (Tradename for a white carbon, manufactured by Shionogi                        Pharmaceutical Co., Ltd.)                                                      ______________________________________                                    

The above ingredients were homogeneously pulverized and mixed to form a wettable powder. Formulation Example 54! Wettable powder

    ______________________________________                                         Compound (1)           3 parts                                                 Compound (6)           3 parts                                                 Sethoxydim             24 parts                                                Zeeklite PFP           45 parts                                                (Tradename for a kaolin-type clay, manufactured by                             Zeeklite Industries Co., Ltd.)                                                 Sorpol 5050            2 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Lunox 1000C            3 parts                                                 (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              Carplex #80 (anticaking agent)                                                                        20 parts                                                (Tradename for a white carbon, manufactured by Shionogi                        Pharmaceutical Co., Ltd.)                                                      ______________________________________                                    

The above ingredients were homogeneously pulverized and mixed to form a wettable powder. Formulation Example 55! Flowable

    ______________________________________                                         Compound (1)           6 parts                                                 Compound (6)           6 parts                                                 Haloxyfop-methyl       33.6 parts                                              Agrizole S-711         8 parts                                                 (Tradename for a nonionic surfactant, manufactured by Kao                      Corporation)                                                                   Lunox 1000C            0.5 part                                                (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              1% Rodopol water       20 parts                                                (Tradename for a thickener, manufactured by Rhone-                             Poulenc)                                                                       Ethylene glycol (anti-freezing agent)                                                                 8 parts                                                 Water                  17.9 parts                                              ______________________________________                                    

The above ingredients were homogeneously mixed to form a flowable. Formulation Example 56! Flowable

    ______________________________________                                         Compound (1)           15 parts                                                Compound (6)           15 parts                                                Quizalofop-ethyl       15 parts                                                Agrizole S-711         8 parts                                                 (Tradename for a nonionic surfactant, manufactured by Kao                      Corporation)                                                                   Lunox 1000C            0.5 part                                                (Tradename for an anionic surfactant, manufactured by                          Toho Chemical Industry Co., Ltd.)                                              1% Rodopol water       20 parts                                                (Tradename for a thickener, manufactured by Rhone-                             Poulenc)                                                                       Ethylene glycol (anti-freezing agent)                                                                 8 parts                                                 Water                  18.5 parts                                              ______________________________________                                    

The above ingredients were homogeneously mixed to form a flowable.

Now, the following Text Examples are given to demonstrate that the combination of compound (1) with one of compounds (2) to (6) has a more excellent effect than their single formulations anticipate, namely has a synergic effect.

TEST EXAMPLE 1

Plastic box having a length of 33 cm, a width of 33 cm and a depth of 8 cm were filled with sterilized diluvial soil, and slender amaranth was sown at a depth of about 1.5 cm dep in each box. The plant was grown in a greenhouse at a temperature of from 20° to 25° C. for 14 days and then treated with chemicals. Wettable powders of compound (1), compound (2), compound (3) and their mixtures were suspended and diluted with water to predetermined concentrations, and 10 ml of each suspension was uniformly applied to the foliage. The plant was grown in the plastic boxes placed in a greenhouse. 28 Days after the treatment, the aerial parts of slender amaranth were weighed, and the control rates (Eo) were calculated from the following formula. ##EQU1##

Although individual active compounds usually have drawbacks in their herbicidal activities, the herbicidal effect of a mixture of two active compounds can exceed the simple sum of the effects of the individual compounds (the expected control rate). In such a case, it is called synergy. The expected control rate Ec of a specific combination of two herbicides is calculated as follows (Colby S. R., calculation of synergic and antagonistic effects of herbicide combinations, "Weed", vol. 15, pp. 20-22, 1967).

Ec=α+β-(α·β)/100

α: The control rate of herbicide A applied at a rate of (a) kg/ha.

β: The control rate of herbicide B applied at a rate of (b) kg/ha.

Ec: The expected control rate of herbicide A applied at a rate of (a) kg/ha and herbicide B applied at a rate of (b) kg/ha.

Namely, when Eo is larger than Ec, the effect of the herbicide combination is considered as synergy.

The results are shown in Table 1 and Table 2. The symbol in the Tables has the following meaning.

A: Slender amaranth

                  TABLE 1                                                          ______________________________________                                         Herbicidal effects of single formulations                                      (control rate %)                                                                             Application rate                                                               of active ingre-                                                 Compound        dient (g/a) A                                                  ______________________________________                                         Compound (1)    0.1         71                                                                 0.2         81                                                                 0.4         85                                                 Compound (2)    1.6         0                                                                  3.2         0                                                                  6.4         5                                                  Compound (3)    1.6         0                                                                  3.2         9                                                                  6.4         38                                                 ______________________________________                                    

                  TABLE 2                                                          ______________________________________                                         Actual and expected herbicidal effects of mixtures                             (control rate %)                                                               Application rate                                                               of active ingre- A                                                             dient (g/a)      Actual value                                                                             Expected value                                      ______________________________________                                         Comp.(1) +     Comp. (2)                                                       0.1      +     1.6       85      71                                            0.1      +     3.2       85      71                                            0.1      +     6.4       85      72                                            0.2      +     1.6       90      81                                            0.2      +     3.2       90      81                                            0.2      +     6.4       92      82                                            0.4      +     1.6       95      85                                            0.4      +     3.2       98      85                                            0.4      +     6.4       100     86                                            Comp. (1)                                                                               +     Comp. (3)                                                       0.1      +     1.6       84      71                                            0.1      +     3.2       86      74                                            0.1      +     6.4       89      82                                            0.2      +     1.6       90      81                                            0.2      +     3.2       90      83                                            0.2      +     6.4       93      88                                            0.4      +     1.6       95      85                                            0.4      +     3.2       95      86                                            0.4      +     6.4       98      91                                            ______________________________________                                          (The expected values in the table are calculated from Colby's equation,        which is mentioned above.)                                               

From the results in Table 2, it is evident that mixtures of compound (1) with compound (2) and compound (3) have effects exceeding the expected values and act synergically on slender amaranth.

TEST EXAMPLE 2

Plastic boxes having a length of 33 cm, a width of 33 cm and a depth of 8 cm were filled with sterilized diluvial soil, and tufted knotweed was sown at a depth of about 1.5 cm. The plant was grown in a greenhouse at a temperature of from 20° to 25° C. and then treated with chemicals. Wettable powders of compound (1), compound (4), compound (5) and their mixtures were suspended and diluted with water to predetermined concentrations, and then 10 ml of each suspension was uniformly applied to the foliage. The plant was grown the plastic box is placed in a greenhouse. 28 Days after the application, the aerial parts of tufted knotweed were weighed, and the control rates (Eo) were calculated in the same manner as in Test Example 1. The results are shown in Table 3 and Table 4. The symbol in the Tables has the following meaning.

B: Tufted knotweed

                  TABLE 3                                                          ______________________________________                                         Herbicidal effects of single formulations                                      (control rate %)                                                                             Application rate                                                               of active ingre-                                                 Compound        dient (g/a) B                                                  ______________________________________                                         Compound (1)    0.1         62                                                                 0.2         71                                                                 0.4         80                                                 Compound (4)    1.6         29                                                                 3.2         66                                                                 6.4         100                                                Compound (5)    1.6         0                                                                  3.2         30                                                                 6.4         43                                                 ______________________________________                                    

                  TABLE 4                                                          ______________________________________                                         Actual and expected herbicidal effects of mixtures                             (control rate %)                                                               Application rate                                                               of active ingre- B                                                             dient (g/a)      Actual value                                                                             Expected value                                      ______________________________________                                         Comp. (1)                                                                               +     Comp.(4)                                                        0.1      +     1.6       80      73                                            0.1      +     3.2       93      87                                            0.1      +     6.4       100     100                                           0.2      +     1.6       85      79                                            0.2      +     3.2       95      90                                            0.2      +     6.4       100     100                                           0.4      +     1.6       89      86                                            0.4      +     3.2       100     93                                            0.4      +     6.4       100     100                                           Comp. (1)                                                                               +     Comp. (5)                                                       0.1      +     1.6       73      62                                            0.1      +     3.2       80      73                                            0.1      +     6.4       83      78                                            0.2      +     1.6       83      71                                            0.2      +     3.2       85      80                                            0.2      +     6.4       90      83                                            0.4      +     1.6       83      80                                            0.4      +     3.2       90      86                                            0.4      +     6.4       95      89                                            ______________________________________                                          (The expected values in the table are calculated from Colby's equation,        which is mentioned above.)                                               

The results in Table 4 clearly indicate that mixtures of compound (1) with compound (4) and compound (5) have effects exceeding the expected values and act synergically on tufted knotweed.

TEST EXAMPLE 3 Herbicidal effects and phytotoxicity test

Plastic boxes having a length of 33 cm, a width of 33 cm and a depth of 8 cm were filled with sterilized diluvial soil, and sugar beet, wild oat, blackgrass, common lambsquater, common chickweed, kedlock, tufted knotweed and slender amaranth were sown in each box at a depth of about 1.5 cm. The plants were grown in a greenhouse at a temperature of from 20° to 25° C. for 14 days and then the flowables prepared in accordance with Formulation Example 11, Formulation Example 12, Formulation Example 13, Formulation Example 14 and Formulation Example 15 were diluted with water and applied uniformly to the foliage. 28 Days after the application, the effects on respective weeds and sugar beet were evaluated on the basis of the following standard ratings.

Standard ratings

5: Complete destruction or control rate of more than 90%

4: Control rate of from 70 to 90%

3: Control rate of from 40 to 70%

2: Control rate of from 20 to 40%

1: Control rate of from 5 to 20%

0: Control rate of less than 5%

The results are shown in Table 5. The symbols in the Table have the following meanings.

A: sugar beet, B: wild oat, C: blackgrass, D: common lambsquater, E: common chickweed, F: kedlock, G: tufted knotweed, H: slender amaranth

                  TABLE 5                                                          ______________________________________                                         Herbicidal effect and phytotoxicity against sugar beet                                Application rate                                                               of flowable                                                                    (g/a)     A     B     C   D   E   F   G   H                             ______________________________________                                         Example 11                                                                              10          0     5   5   5   5   5   5   5                           Example 12                                                                              33          0     5   5   5   5   5   5   5                           Example 13                                                                              67          0     5   5   5   5   5   5   5                           Example 14                                                                              67          0     5   5   5   5   5   5   5                           Example 15                                                                              2.5         0     5   5   5   5   5   5   5                           ______________________________________                                     

We claim:
 1. A herbicidal composition containing a fluoropropylthiazoline derivative represented by the formula (1): ##STR4## and at least one compound selected from the group consisting of compounds represented by the following formulae (2), (3), (4), (5) and (6) as active ingredients: ##STR5##
 2. The herbicidal composition according to claim 1, which contains the compound represented by the formula (2) in combination with the fluoropropylthiazoline derivative.
 3. The herbicidal composition according to claim 1, which contains the compound represented by the formula (3) in combination with the fluoropropylthiazoline derivative.
 4. The herbicidal composition according to claim 1, which contains the compound represented by the formula (4) in combination with the fluoropropylthiazoline derivative.
 5. The herbicidal composition according to claim 1, which contains the compound represented by the formula (5) in combination with the fluoropropylthiazoline derivative.
 6. The herbicidal composition according to claim 1, which contains the compound represented by the formula (6) in combination with the fluoropropylthiazoline derivative. 